###Title:County-level, weighted average arsenic concentrations (µg/L) in community water systems, 2006-2011

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Based on over 230,000 water arsenic monitoring records from over 36,000 community water systems, collected by the US EPA in the Six Year Review of Contaminant Occurrence database. The contribution of water arsenic from each community water system serving a county is weighted by the number of people served by each system. MCL= maximum contaminant level (10 µg/L). MCL compliance category indicates whether the average arsenic concentration was below (Low) or above (High) the 10 µg/L MCL in each time period (2006-2008 versus 2009-2011). Blank/missing counties did not submit adequate data. Six-year estimated averages are for descriptive purposes only; for detailed description of data analysis see Nigra et al. 2020.

 

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Contact me:

Anne (Annie) Nigra, ScM, PhD

Dept of Environmental Health Sciences

Columbia University Mailman School of Public Health

722 West 168th St, Rm 1107, New York, NY 10032

Pronouns: she/her/hers

724-759-0109

aen2136@cumc.columbia.edu